[Boost-bugs] [Boost C++ Libraries] #4608: boost::regex accepts invalid regular expressions like "\\d++"

Subject: [Boost-bugs] [Boost C++ Libraries] #4608: boost::regex accepts invalid regular expressions like "\\d++"
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-08-29 07:34:44

#4608: boost::regex accepts invalid regular expressions like "\\d++"
-----------------------------------------+----------------------------------
 Reporter:  gyk.net <gyk.net@…>          |       Owner:  johnmaddock
     Type:  Bugs                         |      Status:  new        
Milestone:  To Be Determined             |   Component:  regex      
  Version:  Boost 1.44.0                 |    Severity:  Problem    
 Keywords:  regex                        |  
-----------------------------------------+----------------------------------
 In programming languages that don't support possessive quantifier,eg.
 Python and C#,"\d++" is considered as an illegal nested quantifier.And in
 boost::xpressive,"\\d++" will raise a runtime exception.However,it's valid
 in boost::regex.

 {{{
 wchar_t* s = L"abc123" ;
 wregex e(L"\\d+++", boost::regex::normal) ;
 wcmatch m ;

 if(regex_search(s, m, e)){
     wcout <<  m[0] << endl ;
 }
 }}}

 The output is 123.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/4608>
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